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Open-circuit fault tolerant study of bearingless multi-sector permanent magnet machines (2018)
Conference Proceeding
Valente, G., Papini, L., Formentini, A., Gerada, C., & Zanchetta, P. (2018). Open-circuit fault tolerant study of bearingless multi-sector permanent magnet machines. doi:10.23919/IPEC.2018.8507470

This paper presents a fault tolerant study of a multiphase sectored permanent magnet synchronous machine involving a tripel three-phase winding. The machine electromagnetic model is written in a general way so that it can be extended and applied to a... Read More

Optimized control design for power converters in power electronics embedded networks integrating grid model identification (2018)
Conference Proceeding
Li, K., Dewar, D., Formentini, A., Zanchetta, P., & Wheeler, P. (2018). Optimized control design for power converters in power electronics embedded networks integrating grid model identification. In 2018 IEEE Industry Applications Society Annual Meeting (IAS2018)doi:10.1109/ias.2018.8544592

The proliferation of power electronics systems and distributed generation in modern power networks has raised important issues regarding the effects that interconnected converters systems can have on the performance and stability of the whole grid. I... Read More

Disturbance-observer assisted controller for stand-alone four-leg Voltage Source Inverter (2018)
Conference Proceeding
Di Benedetto, M., Lidozzi, A., Solero, L., Tang, M., Formentini, A., & Zanchetta, P. (2018). Disturbance-observer assisted controller for stand-alone four-leg Voltage Source Inverter. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE)doi:10.1109/ecce.2018.8558023

In this paper, a newly disturbance-observer based control strategy for stand-alone four-leg VSI has been proposed and analyzed. The disturbance-observer operates together with a simple and effective resonant controller in order to regulate the invert... Read More

Performance analysis of H_2 optimally controlled three-phase grids (2018)
Conference Proceeding
Dewar, D., Li, K., Formentini, A., Zanchetta, P., & Wheeler, P. (2018). Performance analysis of H_2 optimally controlled three-phase grids. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE)doi:10.1109/ecce.2018.8558087

Embedded electrical grids are comprised of multiple interconnected power converters, and have been recently adopted widely into applications such as micro-grids, electrical ships and More Electric Aircraft (MEA). Key aims of MEA research include redu... Read More

Performance improvement of bearingless multi-sector PMSM with optimal robust position control (2018)
Journal Article
Valente, G., Formentini, A., Papini, L., Zanchetta, P., & Gerada, C. (2018). Performance improvement of bearingless multi-sector PMSM with optimal robust position control. IEEE Transactions on Power Electronics, doi:10.1109/tpel.2018.2853038. ISSN 0885-8993

Bearingless machines are relatively new devices that consent to suspend and spin the rotor at the same time. They commonly rely on two independent sets of three-phase windings to achieve a decoupled torque and suspension force control. Instead, the w... Read More

Identification of Linear Permanent Magnet Synchronous Motor Parameters and Inverter Non-Linearity Effects (2018)
Conference Proceeding
Odhano, S., Tang, M., Formentini, A., Zanchetta, P., & Bojoi, R. (2018). Identification of Linear Permanent Magnet Synchronous Motor Parameters and Inverter Non-Linearity Effects. doi:10.1109/speedam.2018.8445214

The paper presents an automatic parameter identification procedure for linear permanent magnet synchronous motors. The electrical parameters of a test machine are estimated by identification tests performed through the inverter. The method employs th... Read More

Modulated predictive control for indirect matrix converter (2018)
Journal Article
Tarisciotti, L., Lei, J., Formentini, A., Trentin, A., Zanchetta, P., Wheeler, P., & Rivera, M. (in press). Modulated predictive control for indirect matrix converter. IEEE Transactions on Industry Applications, doi:10.1109/TIA.2017.2699666. ISSN 0093-9994

Finite State Model Predictive Control (MPC) has been recently applied to several converter topologies as it can provide many advantages over other MPC techniques. The advantages of MPC include fast dynamics, multi-target control capability and relati... Read More

The design of a position-based repetitive control for speed ripple reduction in PMLSMs (2017)
Conference Proceeding
Tang, M., Formentini, A., Odhano, S., & Zanchetta, P. (2017). The design of a position-based repetitive control for speed ripple reduction in PMLSMs. doi:10.1109/IECON.2017.8216626

Periodic speed errors can occur in permanent magnet linear synchronous machines for two reasons: 1) a periodic reference signal; 2) cogging force and friction. For reducing such periodic errors, iterative learning control or repetitive control approa... Read More

Position control study of a bearingless multi-sector permanent magnet machine (2017)
Conference Proceeding
Valente, G., Formentini, A., Papini, L., Zanchetta, P., & Gerada, C. (2017). Position control study of a bearingless multi-sector permanent magnet machine. doi:10.1109/IECON.2017.8217548

Bearingless motors combine in the same structure the characteristics of conventional motors and magnetic bearings. Traditional bearingless machines rely on two independent sets of winding for suspension force and torque production, respectively. The... Read More

Radial force control of multi-sector permanent magnet machines for vibration suppression (2017)
Journal Article
Valente, G., Papini, L., Formentini, A., Gerada, C., & Zanchetta, P. (2018). Radial force control of multi-sector permanent magnet machines for vibration suppression. IEEE Transactions on Industrial Electronics, 65(7), doi:10.1109/TIE.2017.2780039. ISSN 0278-0046

Radial force control in electrical machines has been widely investigated for a variety of bearingless machines, as well as for the conventional structures featuring mechanical bearings. This paper takes advantage of the spatial distribution of the wi... Read More

Automated and scalable optimal control of three-phase embedded power grids including PLL (2017)
Conference Proceeding
Dewar, D., Formentini, A., & Zanchetta, P. (2017). Automated and scalable optimal control of three-phase embedded power grids including PLL. In 2017 IEEE Energy Conversion Congress and Exposition (ECCE)doi:10.1109/ECCE.2017.8096735

Embedded grids have been increasingly adopted into applications such as More Electric Aircraft where different power converters are interconnected to each other. Interactions between the grid components poses the risk of instability to the system, mo... Read More

Direct flux and current vector control for induction motor drives using model predictive control theory (2017)
Journal Article
Odhano, S., Bojoi, R., Formentini, A., Zanchetta, P., & Tenconi, A. (2017). Direct flux and current vector control for induction motor drives using model predictive control theory. IET Electric Power Applications, 11(8), doi:10.1049/iet-epa.2016.0872. ISSN 1751-8660

The study presents the direct flux and current vector control of an induction motor (IM) drive, which is a relatively newer and promising control strategy, through the use of model predictive control (MPC) techniques. The results highlight that the f... Read More

A fractional delay variable frequency repetitive control for torque ripple reduction in PMSMs (2017)
Journal Article
Tang, M., Gaeta, A., Formentini, A., & Zanchetta, P. (in press). A fractional delay variable frequency repetitive control for torque ripple reduction in PMSMs. IEEE Transactions on Industry Applications, doi:10.1109/TIA.2017.2725824. ISSN 0093-9994

Based on the internal model principle, repetitive controller (RC) is capable to reduce periodic torque ripple by generating a compensating action that consequently need to be synchronized with the original ripple. However, the synchronization is diff... Read More

uCube: control platform for power electronics (2017)
Conference Proceeding
Galassini, A., Lo Calzo, G., Formentini, A., Gerada, C., Zanchetta, P., & Costabeber, A. (2017). uCube: control platform for power electronics. doi:10.1109/WEMDCD.2017.7947749

This paper presents a versatile tool for development, control and testing of power electronics converters. In the last decade, many different expensive off-the-shelf tools for rapid prototyping and testing have been developed and commercialised by fe... Read More

Stability boundary analysis in single-phase grid-connected inverters with PLL by LTP theory (2017)
Journal Article
Salis, V., Costabeber, A., Cox, S. M., Zanchetta, P., & Formentini, A. (2018). Stability boundary analysis in single-phase grid-connected inverters with PLL by LTP theory. IEEE Transactions on Power Electronics, 33(5), doi:10.1109/TPEL.2017.2714860. ISSN 0885-8993

Stability analysis of power converters in AC net¬works is complex due to the non-linear nature of the conversion systems. Whereas interactions of converters in DC networks can be studied by linearising about the operating point, the extension of the... Read More

Enhanced DBCC for high-speed permanent magnet synchronous motor drives (2016)
Journal Article
Tang, M., Gaeta, A., Formentini, A., Ohyama, K., Zanchetta, P., & Asher, G. (2016). Enhanced DBCC for high-speed permanent magnet synchronous motor drives. IET Power Electronics, 9(15), doi:10.1049/iet-pel.2015.0232. ISSN 1755-4543

High bandwidth and accuracy of the current control loop are fundamental requisites when a fast torque response is required or for facilitating the reduction of torque ripple in high performance drives, especially at high speed. One of the most suitab... Read More